SIGNAL-TO-NOISE INTERFERENCE POWER RATIO ESTIMATING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a signal-to-noise (SN) interference power ratio estimating device capable of easily estimating an accurately satisfactory SN interference power ratio. SOLUTION: A pilot signal is inserted to a transmitting signal from an opposite station for the unit of slots in a fixed cycle. According to a RAKE synthesizing signal, the average value of estimated values in the intra-slot signal powers of respective receiving channels is calculated by an intra-slot signal power average value calculating circuit 110. An intra-slot noise interference power is estimated by calculating the diffusion of signals inside the slot from the RAKE synthesizing signal and the intra-slot signal power average value, and an average value concerning channels is calculated by an intra-slot noise interference power average value calculating circuit 111. An SNIR average value calculating circuit 113 estimates the SN interference power ratio from the ratio of the intra-slot signal power average value and an inter-slot average noise interference power average value.